Type-bar action.



J. G-. WALLACE.

TYPE BAR ACTION.

APPLICATION FILED'APELZE, 1913.

Patented D60. 2',v 1915.

amoemtgz i resides, first,

STA

OFFICE.

JAMES G. WALLACE, OF NEW YORK. N. Y.

TYPE-BAR ACTION.

Application filed April 25, 1918.

To all whom it an (511 concern Be it known that I, James G. \VALLACE, a ciiizei: of the United States. residing at New York city, in the county of New York and State of New York, have invented new and useful Improvements in Type-Bar Actions, of which the following is a specification.

The general object of the invention is to refine in point of simplicity, cheapness of construction and of parts, the mechanism for effecting connection between the type bars and key levers of a type-writer. And -to this end the invention resides in connecting points between the ends of the key levers with the pivoted end portions of the type bars, disposing the single connecting elements for each type bar and key lever so as to require nothing be yond the normal amount of depression of the key lever to effect the bringing of the type of the type bar to the work, and forming each of such single connections so as to exert an angular pull on its type bar upon the initial movement of the key lever to which it is connected.

Other objects will appear and be better understood from that embodiment of my invention of which the following is a specification, reference being had to the accompanying drawings forming part hereof, in WhlCl13- Figure l is a vertical cross section of a conventional form of typewriter provided with my invention. Fig. 2 is a detail side elevation on an enlarged scale of the invention. Fig. 3 is a detail front elevation of the connecting element.

5; indicates the base portion of the main frame which carries the superstructure, a portion of which is shown and indicated b 5.

e indicates the carriage supported by the superstructure and d the platen carried by the carriage.

A suitable type rest such as a bar, indicated by e, is carried by the framework a portion of which is shown and indicatetd by f, and base a. The type bar supporting arms one of which is shownvand indicated by g, extend forwardly from a piece it, as shown.

The parts heretofore described are all of well-known construction and form no part of the present invention, which invention in'the relative positions of the points where the connection is effected be Specification of Letters Patent.

a reduction of the number Patented Doc. 7;. it} 11 i. Serial No. 763,615.

tween the type bars 5 and key levers (3: and secondly, in the peculiar shape of the elements which connect the key levers with their respective type bars.

Referring now to the drawings the key levers 6 are preferably formed continuous from the outer ends of key posts 7. This structure at once renders the key levers ex tremely simple and con'iparatively inexpensive to manufacture and this without detracting in any way from their general efliciency.

The type bars 5 are provided at one end with the usual types, 7' and at their inner ends are somewhat enlarged laterally and rounded as indicated at 8. The pivotal points 9 of the type bars are arranged forwardly or outwardly of the pivotal points 10 of the key levers, 2, and since the points of connection between the key levers and type bars are located intermediate the ends of the key levers the latter function as leversof the second class, consequently the relatively complex structures heretofore made necessary in effecting such connection between key levers of the first class and the type bars in order to convert the upward movement of the inner ends of the key bars into a downward pull on the type bars, is substituted with the single connection indicated at 2'.

Referring now to the drawings the member 2' comprises a straight shank portion 11, the upper end of which terminates in a curved portion 12. The element a is as shown, formed of a single piece of wire of such length as will admit of effecting the desired connection between any type bar and key lever after the forming of the curva; ture 9 and the out-turning of the end portions as indicated at 13l3. Referring now to Fig. 2 it will be observed that the portions 13 of the member a pass through lateral openings in the type bar 5 and key lever 6, but these openings are on points'on a line oblique the pivotal points 9 of the type bars. Referring now to Figs. 1 and 2 the points of connection between the members 2' and the type bars are disposed above the turnin points 9 of the type bars and here too it wi be observed that the radius of the curved portion'12 of the connecting member' 71 shown, is greater than that ofv the curved end portion 8 ofthe type bar shown and that such curved portion 12 from its point of as shown in Figs. 1 and lit) to a line perpendicular with o connection with the type bar extends rearwardly and downwardly beyond the edge of the curved portion 8 of the type bar.

The type bar 5 is provided along that intermediate portion thereof which connects the enladged curved end 8 with the free end portion thereof, with relatively long side edges one of which merges into the enlarged curved end portion at a tangent thereto and is l'iereinafter referred to as the distal long edge with relation to the axis upon which the type bar swings. The other relatively longedgc of the type bar is disposed. so stantially radially with relation to the i, largcd curved end thereof. The bOV/BH member 5 resilient and is connected at one end with the type bar at a point above the axis upon which the bar is pivoted and at a point between the lines of the said long edges of the bar and at a point between the line of the distal long edge of the bar with relation to the axis and the axis. The intermediate portion of the said member 6 is bowed and disposed away from the axis and toward the fulcrum of the lever.

Now with this construction it will be manifest that a turning movement will. be imp'arted to the connected end of the type bar upon downward pressure of the key lever and by having the points of connection between the members i and the key levers so disposed as to have the speed at these points during downward movement of the, key levers, bear the required relation to the speeds of the free ends of the type bars to obtain the normal distance which the key must move in order to bring the types to the platen d, then the device will function in point of touch as does the higher grade of typewriters now in use.

\Vhat is claimed as new is:

1. A type bar action comprising a type bar mounted for pivotal movement about an five cents each,

axis and having relatively long side edges, a lever fulcrumed below the bar, and a single resilient bowed operating connection. between the type bar and the lever consisting of a member pivotall y connected at one end with the type bar at a point above the axis upon which the bar is pivoted and at a point between the lines of the said long edges of the bar and at a point between the line of the distal long edge of the bar with relation to the axis and the axis, said member also being pivotally connected to the v lever, the intermediate portion of the -.l member being bowed and disposed away from the said axis and toward the fulcrum of the lever. I

A type bar action comprising a type bar provided with an arcuate end mounted for pivotal. movement about an axis and having relatively long side edges one of which merges with the arcuate end at a tangent, a lever fulcrumed below the bar, and a single resilient bowed operating connection between the type bar and the lever consisting of a member pivotally connected at one end with the type bar at a point above the axis upon which the bar is pivoted, and at apoint between the lines of the said long edges of-the bar and at a point between the point of tangency of that edge of the bar which merges into th: arcuate end at tangent and the axis, said member also being pivotally connected to the key lever, the intermediate portion of the said member being bowed and disposed away from the said axis and to ard the fulcrum of the lever.

In testimonv whereof I atlix my signature in presence of two witnesses.

i J AMES G. XVALLAGE.

Witnesses BERNARD A. Boone, J NO. Rim).

by addressing the Commissioner of Patents,

Washington, I). 0. 

